Abstract: An apparatus for allowing a person to operate a computer while walking on a treadmill with handrails is disclosed. In one embodiment, the apparatus comprises a rigid first member, a rigid second member and a joint connecting a first end of the first member to a first end of the second member. The connection has at least two positions including a first position and a second position. The first position aligns the first and second members into a first configuration for providing a work surface wherein a first surface of the first member is coplanar to a first surface of the second member to create the work surface for supporting a computing device and a user's wrists, the work surface rigid enough to support the computer device and the user's wrists. The second position aligns the first member and the second member into a second configuration for transportation.

Abstract: A system and method for document retrieval is disclosed. The invention addresses a major problem in text-based document retrieval: rapidly finding a small subset of documents in a large document collection (e.g. Web pages on the Internet) that are relevant to a limited set of query terms supplied by the user. The invention is based on utilizing information contained in the document collection about the statistics of word relationships (“context”) to facilitate the specification of search queries and document comparison. The method consists of first compiling word relationships into a context database that captures the statistics of word proximity and occurrence throughout the document collection. At retrieval time, a search matrix is computed from a set of user-supplied keywords and the context database. For each document in the collection, a similar matrix is computed using the contents of the document and the context database.